\n";
}
/**
* Convert a screen string to a screen object
*
* @since 3.0.0
*
* @param string $screen The name of the screen
* @return object An object containing the safe screen name and id
*/
function convert_to_screen( $screen ) {
$screen = str_replace( array('.php', '-new', '-add', '-network', '-user' ), '', $screen);
if ( is_network_admin() )
$screen .= '-network';
elseif ( is_user_admin() )
$screen .= '-user';
$screen = (string) apply_filters( 'screen_meta_screen', $screen );
$screen = new WP_Screen( $screen );
return $screen;
}
/**
* Add contextual help text for a page.
*
* Creates a 'Screen Info' help tab.
*
* @since 2.7.0
*
* @param string $screen The handle for the screen to add help to. This is usually the hook name returned by the add_*_page() functions.
* @param string $help The content of a 'Screen Info' help tab.
*
* @todo: deprecate?
*/
function add_contextual_help( $screen, $help ) {
if ( is_string( $screen ) )
$screen = convert_to_screen( $screen );
$screen->add_old_compat_help( $help );
}
/**
* Register and configure an admin screen option
*
* @since 3.1.0
*
* @param string $option An option name.
* @param mixed $args Option-dependent arguments.
* @return void
*/
function add_screen_option( $option, $args = array() ) {
$current_screen = get_current_screen();
if ( ! $current_screen )
return;
return $current_screen->add_option( $option, $args );
}
function screen_icon( $screen = '' ) {
echo get_screen_icon( $screen );
}
function get_screen_icon( $screen = '' ) {
global $current_screen, $typenow;
if ( empty($screen) )
$screen = $current_screen;
elseif ( is_string($screen) )
$name = $screen;
$class = 'icon32';
if ( empty($name) ) {
if ( !empty($screen->parent_base) )
$name = $screen->parent_base;
else
$name = $screen->base;
if ( 'edit' == $name && isset($screen->post_type) && 'page' == $screen->post_type )
$name = 'edit-pages';
$post_type = '';
if ( isset( $screen->post_type ) )
$post_type = $screen->post_type;
elseif ( $current_screen == $screen )
$post_type = $typenow;
if ( $post_type )
$class .= ' ' . sanitize_html_class( 'icon32-posts-' . $post_type );
}
return '
';
}
/**
* Get the current screen object
*
* @since 3.1.0
*
* @return object Current screen object
*/
function get_current_screen() {
global $current_screen;
if ( !isset($current_screen) )
return null;
return $current_screen;
}
/**
* Set the current screen object
*
* @since 3.0.0
*
* @uses $current_screen
*
* @param string $id Screen id, optional.
*/
function set_current_screen( $id = '' ) {
global $current_screen;
$current_screen = new WP_Screen( $id );
$current_screen = apply_filters('current_screen', $current_screen);
}
/**
* A class representing the current admin screen.
*
* @since 3.3.0
* @access public
*/
final class WP_Screen {
/**
* Any action associated with the screen. 'add' for *-add.php and *-new.php screens. Empty otherwise.
*
* @since 3.3.0
* @var string
* @access public
*/
public $action = '';
/**
* The base type of the screen. This is typically the same as $id but with any post types and taxonomies stripped.
* For example, for an $id of 'edit-post' the base is 'edit'.
*
* @since 3.3.0
* @var string
* @access public
*/
public $base;
/**
* The unique ID of the screen.
*
* @since 3.3.0
* @var string
* @access public
*/
public $id;
/**
* Whether the screen is in the network admin.
*
* @since 3.3.0
* @var bool
* @access public
*/
public $is_network;
/**
* Whether the screen is in the user admin.
*
* @since 3.3.0
* @var bool
* @access public
*/
public $is_user;
/**
* The base menu parent.
* This is derived from $parent_file by removing the query string and any .php extension.
* $parent_file values of 'edit.php?post_type=page' and 'edit.php?post_type=post' have a $parent_base of 'edit'.
*
* @since 3.3.0
* @var string
* @access public
*/
public $parent_base;
/**
* The parent_file for the screen per the admin menu system.
* Some $parent_file values are 'edit.php?post_type=page', 'edit.php', and 'options-general.php'.
*
* @since 3.3.0
* @var string
* @access public
*/
public $parent_file;
/**
* The post type associated with the screen, if any.
* The 'edit.php?post_type=page' screen has a post type of 'page'.
*
* @since 3.3.0
* @var string
* @access public
*/
public $post_type;
/**
* The taxonomy associated with the screen, if any.
* The 'edit-tags.php?taxonomy=category' screen has a taxonomy of 'category'.
* @since 3.3.0
* @var string
* @access public
*/
public $taxonomy;
/**
* The help tab data associated with the screen, if any.
*
* @since 3.3.0
* @var array
* @access private
*/
private static $_help_tabs = array();
/**
* The help sidebar data associated with screens, if any.
*
* @since 3.3.0
* @var string
* @access private
*/
private static $_help_sidebar = array();
/**
* Stores old string-based help.
*/
private static $_old_compat_help = array();
/**
* The screen options associated with screens, if any.
*
* @since 3.3.0
* @var array
* @access private
*/
private static $_options = array();
/**
* Stores the result of the public show_screen_options function.
*
* @since 3.3.0
* @var bool
* @access private
*/
private $_show_screen_options;
/**
* Stores the 'screen_settings' section of screen options.
*
* @since 3.3.0
* @var string
* @access private
*/
private $_screen_settings;
/**
* Constructor
*
* @since 3.3.0
*
* @param string $id A screen id. If empty, the $hook_suffix global is used to derive the ID.
*/
public function __construct( $id = '' ) {
global $hook_suffix, $typenow, $taxnow;
$action = '';
if ( empty( $id ) ) {
$screen = $hook_suffix;
$screen = str_replace('.php', '', $screen);
if ( preg_match('/-add|-new$/', $screen) )
$action = 'add';
$screen = str_replace('-new', '', $screen);
$screen = str_replace('-add', '', $screen);
$this->id = $this->base = $screen;
} else {
$id = sanitize_key( $id );
if ( false !== strpos($id, '-') ) {
list( $id, $typenow ) = explode('-', $id, 2);
if ( taxonomy_exists( $typenow ) ) {
$id = 'edit-tags';
$taxnow = $typenow;
$typenow = '';
}
}
$this->id = $this->base = $id;
}
$this->action = $action;
// Map index to dashboard
if ( 'index' == $this->base )
$this->base = 'dashboard';
if ( 'index' == $this->id )
$this->id = 'dashboard';
if ( 'edit' == $this->id ) {
if ( empty($typenow) )
$typenow = 'post';
$this->id .= '-' . $typenow;
$this->post_type = $typenow;
} elseif ( 'post' == $this->id ) {
if ( empty($typenow) )
$typenow = 'post';
$this->id = $typenow;
$this->post_type = $typenow;
} elseif ( 'edit-tags' == $this->id ) {
if ( empty($taxnow) )
$taxnow = 'post_tag';
$this->id = 'edit-' . $taxnow;
$this->taxonomy = $taxnow;
}
$this->is_network = is_network_admin();
$this->is_user = is_user_admin();
if ( $this->is_network ) {
$this->base .= '-network';
$this->id .= '-network';
} elseif ( $this->is_user ) {
$this->base .= '-user';
$this->id .= '-user';
}
if ( ! isset( self::$_help_tabs[ $this->id ] ) )
self::$_help_tabs[ $this->id ] = array();
if ( ! isset( self::$_help_sidebar[ $this->id ] ) )
self::$_help_sidebar[ $this->id ] = '';
if ( ! isset( self::$_options[ $this->id ] ) )
self::$_options[ $this->id ] = array();
}
function add_old_compat_help( $help ) {
self::$_old_compat_help[ $this->id ] = $help;
}
/**
* Set the parent information for the screen.
* This is called in admin-header.php after the menu parent for the screen has been determined.
*
* @since 3.3.0
*
* @param string $parent_file The parent file of the screen. Typically the $parent_file global.
*/
function set_parentage( $parent_file ) {
$this->parent_file = $parent_file;
$this->parent_base = preg_replace('/\?.*$/', '', $parent_file);
$this->parent_base = str_replace('.php', '', $this->parent_base);
}
/**
* Adds an option for the screen.
* Call this in template files after admin.php is loaded and before admin-header.php is loaded to add screen options.
*
* @since 3.3.0
*
* @param string $option Option ID
* @param mixed $args Option-dependent arguments.
*/
public function add_option( $option, $args = array() ) {
self::$_options[ $this->id ][ $option ] = $args;
}
/**
* Gets the arguments for an option for the screen.
*
* @since 3.3.0
*
* @param string
*/
public function get_option( $option, $key = false ) {
if ( ! isset( self::$_options[ $this->id ][ $option ] ) )
return null;
if ( $key ) {
if ( isset( self::$_options[ $this->id ][ $option ][ $key ] ) )
return self::$_options[ $this->id ][ $option ][ $key ];
return null;
}
return self::$_options[ $this->id ][ $option ];
}
/**
* Add a help tab to the contextual help for the screen.
* Call this in template files after admin.php is loaded and before admin-header.php is loaded to add contextual help tabs.
*
* @since 3.3.0
*
* @param array $args
* - string - title - Title for the tab.
* - string - id - Tab ID. Must be HTML-safe.
* - string - content - Help tab content in plain text or HTML. Optional.
* - callback - callback - A callback to generate the tab content. Optional.
*
*/
public function add_help_tab( $args ) {
$defaults = array(
'title' => false,
'id' => false,
'content' => '',
'callback' => false,
);
$args = wp_parse_args( $args, $defaults );
$args['id'] = sanitize_html_class( $args['id'] );
// Ensure we have an ID and title.
if ( ! $args['id'] || ! $args['title'] )
return;
self::$_help_tabs[ $this->id ][] = $args;
}
/**
* Add a sidebar to the contextual help for the screen.
* Call this in template files after admin.php is loaded and before admin-header.php is loaded to add a sidebar to the contextual help.
*
* @since 3.3.0
*
* @param string $content Sidebar content in plain text or HTML.
*/
public function add_help_sidebar( $content ) {
self::$_help_sidebar[ $this->id ] = $content;
}
/**
* Render the screen's help section.
*
* This will trigger the deprecated filters for backwards compatibility.
*
* @since 3.3.0
*/
public function render_screen_meta() {
// Call old contextual_help_list filter.
self::$_old_compat_help = apply_filters( 'contextual_help_list', self::$_old_compat_help, $this );
if ( isset( self::$_old_compat_help[ $this->id ] ) || empty(self::$_help_tabs[ $this->id ] ) ) {
// Call old contextual_help filter.
if ( isset( self::$_old_compat_help[ $this->id ] ) )
$contextual_help = apply_filters( 'contextual_help', self::$_old_compat_help[ $this->id ], $this->id, $this );
if ( empty( $contextual_help ) ) {
$default_help = __( 'Documentation' );
$default_help .= ' ';
$default_help .= __( 'Support Forums' );
$contextual_help = '